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Author Topic: Mobile setup, need help and opinions on what to get  (Read 12296 times)
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W4AAB
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« Reply #25 on: January 02, 2013, 05:20:52 AM »

I can never figure how I messed up KJ7U's call. That looks like a possibility here. Thanks, Sam!!
                                  Joe W4AAB
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WA2TTP Steve
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« Reply #26 on: January 02, 2013, 08:33:38 PM »

I'm currently using a Icom 7000 into a Little Tarheel 2 antenna mounted on the back of my Nissan Frontier. It works fairly well. I don't operate HF with the setup on a daily basis so the antenna is on a quick disconnect mount and is stored inside the truck. I did replace the 36" whip with a 48" one.

Prior to my retirement I used an Alinco DX-70TH into a High Sierra 1500 antenna. This setup worked very well but this antenna is much taller, heavier and requires a special mounting bracket. I had it mounted on a home brew motorized tilt over mount so I could get into my garage without getting out to remove it. The DX-70TH is a very good mobile radio. I always got good audio reports. One negative with it was it's noise blanker which caused some distortion at times.

A good friend of mine runs a Icom 706mk2 into a 20 meter ham stick and uses a Icom ah4 antenna tuner to operate on 40 meters with the 20 meter antenna. He's happy with it because it provides a fast QSY with no tuning required. I don't think it's the most effecient setup but he works only the county hunters nets and they are used to digging out weak mobile signals. I also think the 706 would be greatly helped by a narrow SSB filter.

Below are some pics of my current setup.

Good Luck,
Steve,
WA2TTP


* P1020719.JPG (151.1 KB, 640x480 - viewed 348 times.)

* P1020721.JPG (159.67 KB, 640x480 - viewed 378 times.)

* P1020720.JPG (172.43 KB, 480x640 - viewed 413 times.)
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w5omr
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« Reply #27 on: January 05, 2013, 09:11:06 PM »

I use a  kenwood TS-450 mobile.  I also use a Bug-catcher.  I don't mind waiting to change bands until the next red light or gas station stop.  I also use a 2-transistor mobile broad-band mo-biel amplifier.  I had a 4-transistor amp, and it was great for ~150w of AM while mobile. 

On One of those 'magical' nights on 75m, was able to break in on  none other than Timtron, while mobiling through North East Texas.  After a rather buzzardly transmission on my part, Tron came back and said 'I can't believe how solid your signal is.  Half-way through that, I had to keep reminding myself 'This guys is Mo-bile!

I think it was the transmission after that, when I discovered why I hadn't ran the 4-transistor amp before.  Either a bug, or a bit of  moisture in the wee hours of the morning, and there was a flashing when I would modulate the rig.  It was Corona on the bug catcher coil.  Pulled the 4-transistor amp shortly thereafter and went back to the two-transistor amp (after cleaning the coil and reworking the antenna) and never had that problem again.  The Q of that center-loaded coil antenna was -that- high.  Bandwidth of about 7kc on 75. ~25kc (2:1 points on SWR meter) on 40m.

Ease of operation with a screwdriver has been previously enjoyed by me, but the screwdriver was never as efficient as the bug catcher.  I tap from the top of the coil down, and use an impedance matching coil at the base of the antenna, with a 102" whip, laying nearly parallel to the bed of the pick-up, raised above the cab of the truck.  I'll post a pic of it tomorrow.

Hamsticks, Mosely center-loaded coils and screwdrivers that need to be re-built every 6 months (from changing bands while in motion will never replace my bug catcher again.  I -would-, on that note, replace it with a Pirannah, from Hi-Q, if someone were to give me one.  Grin

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KA2QFX
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Mark


« Reply #28 on: February 04, 2013, 04:29:29 PM »

I'd be up for a shootout!  We did that at Rochester one year and I fared rather well.  Still have the same mobile antenna from 25 years ago and still works better than anything I've seen commercially. http://home.comcast.net/~msed01/ant1.html
I just have to mount it on the new car. Undecided
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